Paint and process of producing same.



UNITED STATES Patented June 9, 1903.

PATENT OFFICE. 5

PAINT AND PROCESS OF PRODUCING SAME.

SPECIFICATION formingpart of Letters Patent N 0. 730,506, datedJune 9,1903. l

Application filed December 15. 1 902. $$erial No. 135,217. (Nospecimens.) V

"J0 ctZZ whmn it may concern.-

Be it known that l, CUSHING ADAMS, a citizen of the United States,residing at Bellows Falls, in the county of WVindham and State ofVermont, have invented or discovered certain new and useful Improvementsin Paints and Processes for Producing Same, of which the following is aspecification.

This invention or discovery has for its object to provide a paint orcoating composition which may be properly mixed, and which when mixedwill be of such a character that the mineral base thereof will not havea tendency to settle or separate from the waterof the mixture; also, toproduce a waterproof and weatherproof surface, the paint or coatingbeing of such a character that it will adhere strongly to the parts orsurfaces to which it maybe applied.

My improved paint or coating composition comprises a mineral base-astalc, whiting, gypsum, or kaolin-preferably consisting of kaolin andgypsum in about equal proportions; or it may consist entirely of eitherkaolin or of gypsum alone, or it may consist entirely of any one of theother materials just mention ed. Combined with this mineral base i is anadhesive consisting of casein which has I add alum or its chemicalequivalent to the mineral base and adhesive for the purpose of giving ajelly-like body to the paint or coating mixture and also to augment thehardening and water-resisting qualities of the paint or coatingcomposition when a suitable quantity of water has been added to the drycomponents to form the paint or coating, and I also add. lime to thecomposition to give it water-resisting qualities in addition to thosequalities which are obtained by the use of alum.

In carrying my invention or discovery into eifect I take about sevenparts of an alkali or an alkaline substance-as hora-x, carbonate of sodaor soda,- ash, preferably soda-ash and dissolve the same in cold waterand add this alkaline solution to about ninety-three parts of crude drycasein, which will so read-v ily absorb the alkaline mixture as tostill. re-

main in a practically dry condition, and this mixture so obtained ofalkali or an alkaline substance and casein is next ground to a powder. Ithen take about fifteen parts of this casein and alkaline mixture in adry condition and mix the same with a mineral base, consisting,preferably, of about thirtyseven and one-half parts of dry powderedkaolin and thirty-seven and one-half parts of dry powdered gypsum, orthe mineral base may be wholly either of kaolin or gypsum alone, or itmay be of any of the other basic materials hereinbefore mentioned. Ithen add to this mixture about ten parts of dry powdered lime and onepart of dry powdered alum or its chemical equivalent, as soluble saltsof aluminium or aluminium hydroxid. These powdered ingredients are thenthoroughly mixed together to form the paint composition, which is now incondition to be put upon the market in a dry powdered form.

In preparing the paint composition for use about one hundred and twentyparts of cold water, by weight, are added to the powdered mixture orpreparation, and the whole is then thoroughly stirred up together. Theaddition of the alum to the casein and mineralbase mixture gives ajelly-like body to the liquid mixture, sothat the mineral base does notseparate or settle in the liquidmixture, but is held in suspensionmechanically in the somewhat thick and viscous fluid, without, however,deteriorating from the capacity of the same to be easily and thinlyspread upon the surfaces to be painted or coated, the addition of thealum having a contracting effect hardens the coating and increases itswaterproofing or water-resisting qualities.

I do not wish to be understood as limiting my invention or discovery tothe exact proportions of the ingredients hereinbefore stated, as thesemaybe varied somewhat without essentially changing the results aimed at.

Having thus described my invention or discovery, I claim and desire tosecure by Letters Patent- 1.. 'The herein-described paint composition,

consisting of a mineral base, casein, an alkaline substance, lime andalum, in substantially the proportions specified.

2. The herein-described paint composition,

consisting of a mineral base, casein, soda-ash,

lime and alum, in substantially the proporabout seventy-five parts of amineral base, ten parts of lime and one part of powdered alum.

6. The herein-described process for producing a paint composition, thesame consisting in mixing a solution of soda-ash With casein,

grinding the mixture to powder, and then' combining about fifteen partsof the casein and soda-ash mixture with about seventy-five parts of amineral base, ten parts of lime and one part of powdered alum.

In testimony whereof I affix my signature in presence of two witnesses.

CUSHING ADAMS. \Vitnesses: I O. M. SWEENEY, ARTHUR XV. CALVERT.

